EP2265347B1 - Transportvorrichtung mit schwenkachse - Google Patents

Transportvorrichtung mit schwenkachse Download PDF

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Publication number
EP2265347B1
EP2265347B1 EP09717559.0A EP09717559A EP2265347B1 EP 2265347 B1 EP2265347 B1 EP 2265347B1 EP 09717559 A EP09717559 A EP 09717559A EP 2265347 B1 EP2265347 B1 EP 2265347B1
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EP
European Patent Office
Prior art keywords
axle
bearing surface
pivot
pivot member
platform
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09717559.0A
Other languages
English (en)
French (fr)
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EP2265347A2 (de
Inventor
Mark Timothy Kortschot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leverage Design Ltd
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Leverage Design Ltd
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Filing date
Publication date
Application filed by Leverage Design Ltd filed Critical Leverage Design Ltd
Publication of EP2265347A2 publication Critical patent/EP2265347A2/de
Application granted granted Critical
Publication of EP2265347B1 publication Critical patent/EP2265347B1/de
Active legal-status Critical Current
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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/0073—Roller skates; Skate-boards with offset wheel, i.e. wheel contact point to surface offset from other associated wheel
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/0093—Mechanisms transforming leaning into steering through an inclined geometrical axis, e.g. truck
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/01—Skateboards
    • A63C17/011—Skateboards with steering mechanisms
    • A63C17/012—Skateboards with steering mechanisms with a truck, i.e. with steering mechanism comprising an inclined geometrical axis to convert lateral tilting of the board in steering of the wheel axis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/01—Skateboards
    • A63C17/014—Wheel arrangements
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/04—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/14—Roller skates; Skate-boards with brakes, e.g. toe stoppers, freewheel roller clutches
    • A63C17/1409—Roller skates; Skate-boards with brakes, e.g. toe stoppers, freewheel roller clutches contacting one or more of the wheels
    • A63C17/1418—Roller skates; Skate-boards with brakes, e.g. toe stoppers, freewheel roller clutches contacting one or more of the wheels with radial movement against the roll surface of the wheel
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/14—Roller skates; Skate-boards with brakes, e.g. toe stoppers, freewheel roller clutches
    • A63C2017/1463—Foot or toe operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K3/00—Bicycles
    • B62K3/002—Bicycles without a seat, i.e. the rider operating the vehicle in a standing position, e.g. non-motorized scooters; non-motorized scooters with skis or runners

Definitions

  • the present invention relates to conveyances including skateboards, scooters, roller skates, as well as low profile skateboards, low profile roller skates, and other forms of conveyances.
  • Some embodiments can include skateboards having a unitary platform with one or more inclined planar surfaces that serve as bearing surfaces for steerable axles and wheels.
  • skateboards In order to mechanically link tilting of the platform with turning of the wheels about a vertical axis, skateboards include a device called a truck.
  • Conventional skateboard trucks are formed from metal or plastic, and are bulky, and usually contain four primary-components: a truck hanger, a base plate, a kingpin, and bushings. These trucks are conventionally located under the horizontal platform that the rider stands on, and the wheels are also usually located underneath the platform. Examples of a conventional skateboard truck include the Randal R-II, or the Destructo Mid Raw 5.0 Skateboard Truck.
  • skateboards In the past, some skateboards have been designed to be used and then conveniently and easily carried with the user when the user is not riding the skateboard. Various features have been designed to meet this portability objective: skateboards that are of low weight, are foldable, are collapsible, or are readily disassembled. However, these skateboards have employed, for the most part, conventional trucks.
  • Collapsible push scooters including those with lowered platforms are popular. Some of these have relatively short distance between the road surface and top of the riding platform. These scooters are typically made from metal, and although the steering handle collapses and folds, they are still bulky and cumbersome when in their most compact position. There are also a variety of skateboards available with lowered decks so that the rider can push the skateboard more readily.
  • Document US-4.061.350 discloses relevant prior art.
  • Document US-5.971.411 discloses a transportation device according to the preamble of claim 1.
  • the invention provides a device for transportation comprising a platform comprising a ride surface upon which a rider may place a foot to ride the device in a direction of travel on the ground, so that the ride surface is an upper surface in use, the platform having a length extending in that direction and a forward portion and a rearward portion; a pair of wheels adjacent either the forward portion or the rearward portion and at least one wheel adjacent the other portion; an axle extending between the pair of wheels and located in an axle mounting system attached to the platform; the axle mounting system comprising an axle bearing surface and a pivot member having a pivot surface, the axle bearing surface and the pivot surface being inclined towards each other and each of the axle bearing surface and the pivot surface being inclined with respect to the ride surface, the pivot surface contacting the exterior of the axle creating a point of contact, between the exterior of the axle and the contact surface, about which point of contact the axle can pivot, and creating a pivot about which the axle can pivot to provide, in use, a turning function for the device and the axle bearing surface extending transversely to
  • the axle bearing surface is located or extends adjacent each af the pair of wheels. This is to extend support to just inboard of the wheels, which in some embodiments are outside the perimeter of the foot of a rider. This reduces the bending stresses on the axle, and reduces the weight of the board.
  • the axle bearing surface has a length substantially the same as the length of the portion of the axle between the wheels.
  • the pivot member surface opposes the axle bearing surface.
  • the pivot member comprises a portion having a substantially triangular cross-section.
  • the surface of the pivot member is curved.
  • the axle bearing surface comprises a substantially planar portion.
  • the axle bearing surface comprises a curved portion.
  • the axle bearing surface comprises two or more substantially planar portions.
  • the location of the contact portion on the surface of the pivot member changes as the axle pivots about the pivot surface.
  • the location of the contact portion on the surface of the pivot member changes as the axle pivots about the pivot member surface, and the contact portions on the surface of the pivot member defined as the axle pivots describe a curve substantially parallel to a vertex of an angle between the surface of the pivot member and the bearing surface.
  • the bearing surface is a discontinuous surface.
  • the surface of the pivot member is a discontinuous surface.
  • the device further comprises a spring or spring like structure contacting the axle, and opposing the axle bearing surface.
  • the surface of the pivot member is curved, and the curved surface of the pivot member comprises a portion having a radius of curvature of about 140 to about 170 mm.
  • the surface of the pivot member is curved, and the curved surface of the pivot member comprises a central portion having a first radius of curvature, a first outboard portion having a second radius of curvature, and a second outboard portion having a third radius of curvature.
  • the surface of the pivot member is curved, and the curved surface of the pivot member comprises a central portion having a first radius of curvature, a first outboard portion having a second radius of curvature, and a second outboard portion having a third radius of curvature, wherein the first radius of curvature is greater than the second or third radii of curvature.
  • the surface of the pivot member is curved, and the curved surface of the pivot member comprises a central portion having a first radius of curvature, a first outboard portion having a second radius of curvature, and a second outboard portion having a third radius of curvature, wherein the first radius of curvature is greater than either of the outboard radii, the outboard radii preferably being equal to one another.
  • the radius of curvature of the curved pivot member is about 5 to 10 inches, preferably about 6-8 inches.
  • the angle between the pivot member surface and the axle bearing surface is about 70 to about 110°.
  • the surface of the pivot member is curved, and the curved surface of the pivot member comprises a central portion having a first radius of curvature, a first outboard portion having a second radius of curvature, and a second outboard portion having a third radius of curvature, wherein the first outboard portion and the second outboard portion are on opposite sides of the central portion.
  • the angle between the surface of the pivot member and the bearing surface measured at a central portion of the pivot member is different from the angle measured at an outboard portion of the pivot member.
  • the pair of wheels is adjacent the forward portion.
  • the pair of wheels is adjacent the rearward portion.
  • the platform has a top surface defining a first plane, the axle bearing surface forming an angle with a second plane parallel to the first plane being about 26 to about 45 degrees.
  • the platform has a top surface defining a first plane, the axle bearing surface forming an angle with a second plane parallel to the first plane being about 26 to 45 degrees, more preferably about 30 to about 40 degrees.
  • a method for turning a transportation device comprising pivoting an axle about a pivot member surface, wherein the pivot member surface contacts the axle and is disposed at an angle to a bearing surface and has a fixed position in relation to the bearing surface, the pivot member surface opposing the bearing surface and the bearing surface slidably contacting the axle, the axle extending between a pair of wheels positioned adjacent a forward portion or rearward portion of a ride surface suitable for placement of a rider's foot thereupon and the ride surface having at least one wheel adjacent the other portion of the ride surface.
  • a device for transportation comprising a platform upon which a rider may place a foot to ride the device in a direction of travel on the ground or similar surface, the platform having a length extending in that direction and a forward portion and a rearward portion; a pair of wheels adjacent either the forward portion or the rearward portion and at least one wheel adjacent the other portion; an axle extending between the pair of wheels and located in an axle mounting system attached to the platform, the axle being configured to pivot on-an inclined surface, so that when a user leans to turn the device the platform tilts into the turn direction and the center of the top surface of the platform increases in altitude as the axle moves on the inclined surface to establishes a new position thereon.
  • the inclined axle bearing surface may the other characteristics described herein.
  • the axle mounting system is attached to the underside of the platform.
  • the device may further comprise a member about which the axle pivots as the axle moves on the inclined surface.
  • the pivot member may a curved surface and/or the other characteristics described herein..
  • wheeled conveyances including, for example, low profile wheeled conveyances, such as skateboards, scooters, kick scooters and/or roller skates.
  • some embodiments of the conveyance disclosed herein include a foot support platform 32 having an integral, full-width or partial-width inclined axle bearing surface 38 which supports a transverse axle 36.
  • the inclined axle bearing surface 38 can be a planar surface and can form an angle of between about 10° and about 70° with the horizontal plane, said plane being defined as parallel to the travel surface, depending, for example, on the steering responsiveness required.
  • the axle 38 supports a pair of wheels 34R and 34L.
  • the inclined axle bearing surface 38 supports the axle 36 across all or part of its span between the wheels 34R and. 34L, but in some embodiments, said surface 38 can support the axle 36 in the regions adjacent to the wheels 34R and 34L and can reduce the bending moment applied to the axle.
  • the wheels 34R and 34L can be conventional skateboard or roller skate or in-line skate or scooter wheels or other types of wheels, and in some embodiments a pair of roller or plain bearings, not depicted in these figures, can be located between the solid body of the wheel and the axle.
  • the axle may or may not rotate about its own longitudinal axis when the skateboard moves, and the wheels rotate.
  • the axle can be offset from the center of the wheel in a vertical and/or horizontal direction, such as is shown in FIG. 17 .
  • the wheels 34R and 34L may be retained at a specific location along the length of the axle 36 by any conventional means commonly used, including those used for skateboard, roller skate, in-line skate, or scooter wheels, but other methods can be used as well. The method of retention is not depicted here.
  • a pair of compression springs 44R and 44L can be compressed by the axle 36 against a spring bearing surface 39 that can be an integral part or added part of the foot support platform.
  • These springs may be rubber blocks, cell springs, leaf springs or any other type of member capable of supporting compression parallel to the surface of the inclined axle bearing surface 38 and perpendicular to the axle 36.
  • the compression springs serve to restore the axle to a position perpendicular to the long axis of the conveyance 82 (see FIG. 11 ), when no torque is applied by the user about said axis 82.
  • the compression springs therefore function to keep the conveyance running in a straight line or particular direction unless the user deliberately tilts the conveyance to make a turn or change the direction.
  • a turning bias can be built into the conveyance, such as by adjustment of the compression springs, the axle bearing surface or the pivot member design or position, such as to correct for an off-balance load, sloped travel surface, etc. or to favor, cause, or build-in a turning condition to the conveyance.
  • tension springs can be used in place of or in combination with compression springs. Suitable locations for tension springs include in front of and below the axle instead of the compression springs 44R and 44L.
  • a pivoting axis 43 may be formed by the inclusion of a pivot member 40 formed in the shape of a triangular prism, or some other shape, including those which have a ridge configured to contact the axle.
  • springs for different rider weights, ability level, size, or performance can be provided with or separate from the conveyance for tuning the operation of the conveyance, or for other reasons, such as maintenance.
  • the spring response on operability can be adjusted, such as by including provision to adjust the lateral position of the springs on the spring bearing surface 39.
  • a single rear wheel 46 can be supported by an axle 50 inserted through holes or indentations in the foot support platform, and retained by any conventional means.
  • the wheel 46 can be positioned between the platform forks 49R and 49L and retained in an appropriate position by suitable methods including spacers, axle design features (such as interference fit, bumps, indentations, protuberances, etc.), nuts, etc. It is also possible to mold suitable spacers or other suitable features as part of the foot support platform 32.
  • a single wheel similar to that described for the rear can be utilized in the front with a system comprising an axle and inclined axle bearing surface, as described herein, in the rear, or a system comprising an axle and inclined axle bearing surface, as described herein, in both the front and the rear.
  • a fender 48 can be included as part of a foot support platform to cover a single wheel 46 or a pair of wheels.
  • the fender 48 could be molded as part of a foot support platform in a single molding operation, and can have sufficient rigidity to serve as a rest platform for a rider's ground engaging foot (the "pushing foot”).
  • the fender 48 could be designed with sufficient flexibility that it could engage the wheel to serve as a friction brake when a rider's weight was transferred from the front foot to the rear foot to press down substantially on said fender 48.
  • fenders can be utilized, such as by molding as part of the foot support platform 32 or otherwise, for example to prevent the rider's foot from engaging the rotating wheels 34R and 34L. Partial front fenders 70R and 70L are shown in FIG. 9 and FIG. 10 . In some embodiments, fenders or partial fenders can prevent the axle from being unduly loaded in bending in the event that the user inadvertently stepped on the conveyance while it was upside down on the ground.
  • An optional deadman's brake assembly can be composed from an angled lever 58, a torsion spring 60 a depression 61 in the foot support platform body 32 and an axle 62. If the user steps-off or falls off the conveyance, the torsion spring 60 presses the rear part of the angled lever 58 against the rear wheel 46 and slows or stops the conveyance
  • a compression spring may be inserted between the depression 61 in the foot support platform body 32 and the angled lever 58 to provide the deadman's brake action
  • an optional deadman's brake is formed as an integral part of the foot support platform in order to reduce the number of parts and simplify assembly.
  • the brake 66 can be formed so that in the unstressed state it protrudes above the plane of the conveyance platform 32 and engages the rear wheel 46 as depicted in FIG. 8A .
  • the brake shoe 66 disengages from the rear wheel 46 as depicted in FIG. 8B .
  • an axle bearing surface 38 can be positioned at an angle to a pivot member 40, 80 or 90.
  • the bearing surface can be monoplanar as shown in FIG. 1 , or multiplanar or curved, as shown in FIG. 13 .
  • the curved or multiplanar character can be in a direction parallel to the long axis of the axle, at an angle to the long axis of the axle, or both parallel and at an angle to the long axis of the axle.
  • the axle bearing surface can extend substantially from one end of the axle to the other or from one wheel to the other.
  • the axle bearing surface can extend for a different distance over the length of the axle, such as 90% of the distance between the ends of the axle or the distance between the wheels, or for about 80% or for about 70% or for about 60% or for about 50% or for about 40% or for about 30% or for about 20% or less.
  • the axle can be made stronger, such as through dimensioning of the axle or through the selection of the materials used for the axle.
  • the bearing surface can be made stronger, such as by selection of materials used for its construction.
  • the axle bearing surface can be removable, such as for replacement due to wear or to change the turning characteristics of the device, or for some other reasons including cosmetic.
  • the pivot member or its contact surface with the axle can be removable, such as for replacement due to wear or to change the turning characteristics of the device, or for some other reasons including cosmetic.
  • Different shapes as well as materials and material hardness/resilience can be utilized for the bearing surface and the pivot member and pivot member surface, as desired such as for different turning or performance characteristics.
  • the pivot member 40 can have a narrow contact region for contacting the axle, such as with a triangular cross-section as shown in Fig 1 , or some other shape that presents a narrow or sharp surface to the axle. Suitable other shapes include those having a cross-section related to or including a square, rectangle, pentagon, teardrop, round or other shape. The narrow or sharp surface can also be truncated.
  • the pivot member can be a protruding portion from another part, such as the foot support platform a base structure, or another part.
  • the pivot member 40 defining a single pivot axis 43 is replaced with an extended pivot member 80.
  • the extended pivot member 80 is shaped so that the point or area of contact between the axle and the pivot member 80 shifts towards the inside of the turn, when the conveyance is tilted as depicted in FIG. 12 .
  • a curved version of the extended pivot member 90 is depicted in FIG. 14 .
  • FIG 16 Another version of a curved extended pivot member is shown in FIG 16 , where the extended pivot member 90 has a curved face convex away from one end of the foot support platform. This curved face approaches or intersects the axle bearing surface 38 along a curved line 94, where the ends of the curved line 94 curve upward and toward one end of the foot support platform 32.
  • the pivot member 90 and the axle bearing surface 38 can be separated somewhat, such as with a gap or an intervening material, wherein the intervening material is flush, protrudes out, or is recessed from the surface of the pivot member 90 and/or the axle bearing surface 38.
  • the foot support platform 32 In operation, when the rider leans or otherwise causes a turn, the foot support platform 32 will tip, with one edge of the foot support platform 32 moving toward the axle 36, and the other edge moving away from the axle 36. As the foot support platform 32 tips, the axle 36 shifts its contact zone 107 with the pivot member 90 to a new zone closer to the edge of the foot support platform on the side where the edge of the foot support platform 32 moved toward the axle, as shown in FIG. 22 .
  • This axle movement results in the axle 36 pivoting with a component of the pivoting in a plane substantially parallel to plane of the travel surface or the top of the foot support platform 51, with the wheel 34R or 34L at one end of the axle moving forward and the wheel 34L or 34R on the other end of the axle moving rearward, in relation to the direction of travel, causing a turning effect.
  • the direction and magnitude of the turning effect can be varied, such as to be more sensitive, less sensitive, to turn in the direction of leaning or compression of the foot support platform 32 toward the axle 36 or away from the direction of leaning or compression of the foot support platform 32 toward the axle 36.
  • a curved extended pivot member 80 having an approximately constant radius of curvature is shown.
  • the curved extended pivot member 90 can have a variable radius of curvature, such as with the central portion having a larger (flatter) radius of curvature than the outboard portions.
  • a variable curvature can be advantageous, for example, in providing increased straight line stability, with minor shifts by a rider causing only small shifts in the axle position, while still allowing sharp turns.
  • Suitable amounts of curvature include radii of about 80 to about 300 millimeters, while some embodiments can have radii of about 110 to about 220 mm or about 120 to about 180 mm, with some special embodiments having even higher or lower amounts of curvature.
  • Suitable degrees of curvature can relate to the angle the bearing surface 38 forms with the horizontal plane, the sharpness of the turn desired, the dimensions of the foot support platform 32, the size of the rider, etc.
  • FIG. 18B the angular relationship of one embodiment of a curved extended pivot member 90 to an axle bearing surface 38 is shown.
  • the included angle between the axle bearing surface 38 and the curved extended pivot member 40 can be any suitable angle, including angles of about 45 to about 135°. In some embodiments, the angle can be about 75 to about 110°, or about 85 to 95°.
  • the angle between the axle bearing surface 38 and the horizontal plane 93 can be about 10 to about 70°. In some embodiments, this angle can be about 20° to about 50°, or about 20° to about 40°, or about 25° to about 35°. Changes to either of these angles can provide the ability to, for example, adjust the turning response of the device as desired.
  • a pivot member with a ridge axle contact area is used, but the inclined axle bearing surface is no longer planar 88A and 88B.
  • the mode of action will be described later in this document.
  • a non-planar inclined axle bearing surface can be combined with an extended pivot member or a curved extended pivot member.
  • the face of the extended pivot member or curved extended pivot member which has the axle contact area can be curved in both a horizontal and a vertical direction.
  • the non-planar surface can be made of or approximate a number of planar surfaces, or it can be continually curved.
  • the pivot member can be a pin or a rod.
  • the pivot member contacts the exterior of the axle, such as at a round, flat, grooved, dimpled, indented, etc. portion of the axle or covering; in some examples different from the claimed invention, the pivot member can contact the interior of the axle, such as in a hole or contact the interior and exterior of the axle.
  • the axle 36 can include a covering over at least a portion of its surface, and the pivot member can contact the exterior or interior of the covering portion of the axle 36.
  • the pivot member can be a pin protruding from the center of the axle 36 at a right angle or another angle to the axle, said pin can protrude into a hole or cavity formed in a middle portion of the inclined axle bearing surface 38.
  • more than one pin can be utilized.
  • the bearing surface can be a continuous or a discontinuous surface.
  • Suitable discontinuous surfaces include those made up of a number of separated surfaces or surfaces interconnected with a different material or a recessed material.
  • Individual surfaces can be made of like or unlike materials. Individual surfaces can be flat, curved, circular, rectangular, regular, a regular, interlocking, non-interlocking, or any other suitable shape as desired.
  • the surface of the pivot member can be a continuous or discontinuous surface as well.
  • a continuous bearing surface can be utilized with a pivot member having a discontinuous surface, or a discontinuous bearing surface can be utilized with a pivot member having a continuous surface, or both the bearing surface and the surface of the pivot member can be either continuous or discontinuous.
  • the pivot member or the bearing surface can be made up of a series of individual parts, such as in the form of ridges protruding from a support material or a separate part. Examples of discontinuous faces on the axle bearing surface and the pivot member surface are shown in FIGS. 19B , 20A and 22 .
  • the axle bearing surfaces and pivot members surfaces are formed by an opened cell network performed by a plurality of struts, which are chosen of a spacing and thickness of material sufficient to withstand relevant forces from the axle.
  • FIGS. 20A and 22 show an extended curved surface 122 arranged symmetrically across the longitudinal access of the conveyance. As shown, the pivot surface extends a substantial proportion of the width of the device in this area. In these figures remaining in that area is shown in recessed portions 124 and 125.
  • the device may have one or more handles attached to or formed therein. Such handles can aid in riding the device or performing maneuvers and/or can be used to attach pulling cords and the like.
  • the forward end or front end of the device has an handle.
  • the rear of the device may also have a handle, for example as is shown in FIGS. 19A , 19B , (120, 121).
  • the pivot member can be disposed at an angle to the bearing surface, such as where the bearing surface and the surface of the pivot member intersect at the vertex 106 of an angle, as shown in FIG. 20A .
  • the pivot member can be disposed at an angle to the bearing surface with a gap between the surface of the pivot member and the bearing surface, such as where a continuation of the pivot member surface or the bearing surface could intersect with the other.
  • additional material can be interposed between the surface of the pivot member and the bearing surface, such as in the vicinity of the vertex of the angle.
  • the entire pivot member and the bearing surface can be separated such as by a gap or by intervening material.
  • the surface of the pivot member can be located such that a ray 101 originating from a contact zone 107 of the axle 36 with the surface of the pivot member 90, normal to the axle and passing through the axle centerline 105 ("normal ray") has a component 102 substantially parallel to the direction of travel 104.
  • the surface of the pivot member can oppose the bearing surface, such as where a normal ray intersects the bearing surface or intersects with a plane that would be an extension of an edge of the bearing surface or a plane that includes it is parallel to a portion of the bearing surface that contacts the axle.
  • an overmolded axle block 92 is depicted. This may be a simple rectangular prism used in conjunction with the springs and/or pivots described previously, or may incorporate an extended pivot member section as illustrated, including optional curved and non-curved portions.
  • the axle block 92 can be integral to the axle, or assembled to the axle.
  • the axle 36 slides across the inclined axle bearing surface 38 and the axle pivots, a component of the rotation lying in a plane substantially parallel to the top surface of the foot support platform 32.
  • an outboard portion of the axle 36 slides across the bearing surface.
  • the axle includes a covering, spacer, etc. which contacts the axle bearing surface 38, the covering, spacer, etc. portion of the axle 36 will slide across the surface.
  • the sliding motion can be described in some embodiments as an arc, a displacement, or a combination of an arc and a displacement.
  • the conveyance is represented as a three-wheeled device, with a single rear wheel, but it should be understood that the single rear wheel may be replaced by a second integral truck and wheel assembly which is the minor image of the front truck and wheel assembly about a plane whose normal vector is the long axis of the conveyance 82.
  • the fender 48 can serve as a platform for the rider to rest his pushing foot, when coasting down a hill for example.
  • a four-wheeled device can include a cantilevered beam, fixed with respect to the main riding platform and preferably molded as part of a foot support platform, protruding from the rear end of the foot support platform, behind the rider's heel, and can include such features as fender and brakes as desired.
  • the rear fender 48 can be made to be flexible or compliant, so that with heavier pressure from the foot resting on it, it could serve as a brake by deforming and engaging with the rotating rear wheel 46 below it.
  • An integral leaf spring could be formed in the elastic material of the fender to facilitate this motion.
  • the entire fender could also be made to pivot around an axis parallel to but not coaxial with the rear axle, where resistance to pivoting would be supplied by a spring. In various embodiments, the fender would not engage the wheel with moderate pressure exerted by resting the rider's pushing foot during coasting, but would engage with heavier pressure applied by transferring weight to the pushing foot if the user wished to stop the conveyance. Resistance to the fender pivoting action could be applied by a torsion spring, or a rigid lever arm combined with a tension or compression spring.
  • the compression springs 44R and 44L can be attached to the platform with an adhesive or adhesive tape, or can be retained in a slot or cavity molded or cut in the spring bearing surface 39.
  • the product may be provided with a set of springs of differing stiffnesses to accommodate riders of various weights. Such a set of springs may be color coded.
  • the springs 44R and 44L in the various figures provided are depicted in a somewhat central location for clarity, in practice it would be advantageous to position them as close to the wheels 34R and 34L as possible, to minimize the bending moment on the axle 36.
  • Another method of providing variable resistance to turning can include placing the springs 44R and 44L in a slot formed in the spring bearing surface 39, where the position of the springs along the axle 36 could be adjusted. If the springs 44R and 44L are moved towards the center of the spring bearing surface 39 (and closer to each other) the resistance to pivoting of the axle can be reduced, which might be desirable for a lighter rider. With the springs in wider positions (farther from each other), the resistance to pivoting of the axle can be increased, which might be desirable for a heavier rider. Higher resistance to pivoting can occur with the springs located directly adjacent to the wheels, 34R and 34L.
  • the full-width or partial-width inclined axle bearing surface 38 is described as formed as an integral part of the platform, however, it should be understood that even where the inclined axle bearing surface 38 is shown as full-width in all the drawings, the inclined bearing surface 38 can be narrower and can provide support to the axle 36 near the wheels, away from the wheels, or both near and away from the wheel, and the support for the axle can be continuous, or at discrete points over at least a portion of the length of the axle. Variations of these aspects of the design can provide additional benefits such as reducing the bending moment experienced by the axle over that experienced by axles in other designs. In some embodiments, the reduced bending moment of the axle 36 means that the axle can be of smaller diameter and lower cost and weight. In some embodiments, the inclined axle bearing surface 38 maybe cut away or not in contact with the axle 36 in the central part of the platform 32, near the pivot member 40 or 80 or 90.
  • the inclined axle bearing surface 38 is at various points shown and described as part of a unitary body, such as can be produced by injection molding the platform 32 and inclined axle bearing surface 38 in one shot from a suitable thermoplastic.
  • the inclined axle bearing surface 38 could be molded or formed from a different material and snapped or fastened to the main platform body 32.
  • the body and/or platform can be made from multiple pieces and then assembled.
  • a unitary construction can have advantages of a higher resistance to bending than some other designs, and thus may be preferred in some cases, and can result in reduced the weight and cost, including fabrication costs of the conveyance while maintaining an adequate bending stiffness of the platform 32.
  • leaf springs are integrally formed as part of the spring bearing surface 39 of the foot support platform 32 and replace springs 44R and 44L. This embodiment is dependent on the body of the unitary platform being constructed of a resilient, elastic material.
  • the platform can be attached to the rider's shoe such as with a flexible or semi-rigid strap 68 fastened to the body 32 somewhere between the front and rear wheels.
  • a strap, lace or other attachment may be quickly fastened to itself with, for example, Velcro® on top of the rider's shoe, or otherwise.
  • a Velcro® patch or other releasable engagement means could be added to the sole of the rider's shoe to engage with its counterpart attached to the platform of the conveyance.
  • a special set of shoes with slots molded in their soles to engage a tab to be molded in the upper surface of the conveyance, or to provide engagement for a binding system such as is used for bicycles, skis, snowboards, etc. can be used.
  • various other attachment systems or devices can be used, such as those used for attaching a roller skate, ski, snowboard, water ski, or other conveyance to a shoe, boot, or foot may also be employed.
  • a deadman's brake assembly is depicted in FIG. 6 , where the rear fender 48 has been cut-away for clarity.
  • the torsion spring 60 causes the angled lever 58 to engage the rear wheel and slow or stop the conveyance when the rider falls or steps off.
  • the point of contact of the angled lever with the wheel is designated the "friction pad.”
  • his or her heel can engage the front part of the angled lever 58 forcing it into a depression 61 formed in the platform 32 and disengaging it from the rear wheel 46, allowing the conveyance to roll unimpeded.
  • the angled lever 58 can be supported by an axle 62.
  • the torsion spring 60 could be replaced with a compression spring (coil, rubber, etc.) located, for example, between the horizontal portion of the angled lever 58 and the floor of the depression 61 in the platform body 32.
  • FIG. 8 an embodiment of a deadman's brake assembly in which the angled lever is replaced by a tab that is formed as an integral part of the platform 32 is depicted.
  • This embodiment has the body of the foot support platform 32 being constructed of a resilient, elastic material that can deform elastically when the user's foot depresses the tab.
  • a material such as polypropylene, into which a living hinge can be molded could be used, with an optional secondary spring to provide at least a portion of the force that the deadman's brake applies to the wheel.
  • the axle 36 can be prevented from sliding side to side relative to the longitudinal axis 82 of the platform 32. This may be accomplished in various ways.
  • a cylindrical pin is welded to the axle or screwed into a cavity in the axle such that the central axis of the cylindrical pin passes through a central area of the axle. Said pin protrudes from the axle, and fits in a hole formed in a corresponding portion of the inclined axle bearing surface 38.
  • the pin can function as a pivot member 40.
  • the axle can be positioned by two disks 64L and 64R fastened at a fixed axial position to the axle 36 between the wheels 34L arid 34R and the outermost edges of the inclined axle bearing surface 38 of the platform 32, as depicted in FIG. 7 .
  • the axle When the rider is riding the conveyance and exerting a downward force on the platform, the axle can be held in its vertical location relative to the foot support platform 32 and the axle bearing surface 38 by the balance of forces; since the ground exerts an upward force on the axle through the wheels.
  • it can also desirable to provide a means of retaining the axle in position relative to the inclined axle bearing surface 38 if the rider picks the conveyance off the ground.
  • a rod 45 has been inserted in a hole drilled in the pivot member 40. This rod 45 wraps underneath the axle 36, and can, for example, hold the axle securely against the inclined axle bearing surface 38 or otherwise prevent the axle from falling off.
  • FIG. 3 a rod 45 has been inserted in a hole drilled in the pivot member 40. This rod 45 wraps underneath the axle 36, and can, for example, hold the axle securely against the inclined axle bearing surface 38 or otherwise prevent the axle from falling off.
  • a pin 94 passes through the axle 36 and a slot or hole 91 in the axle bearing surface 38.
  • the slot will allow sufficient travel for the axle to move and turn in response to the efforts made by a rider to turn.
  • a retention means could also be built into the compression springs 44R and 44L by having a protuberance in the springs hook around the underside of the axle.
  • a band of the material of which the unitary platform 32 is constructed (not depicted) passing underneath the axle may be molded as an integral part of the unitary platform. It should be noted that the various retention devices shown can be used with the various pivot members and axle bearing surfaces described herein.
  • the axle 36 can be a solid or unitary cylinder. In some embodiments, the axle 36 can be non-solid, multi-piece, or a shape other than a cylinder.
  • the axle can have any other cross-sectional shape, including square, rectangular, variable, etc., and the axle can be hollow, multi-part, a single piece, etc.
  • the axle can have one or more holes, cavities, indentations, extensions, protrusions or other shape features, such as for receiving a spring, a pin, an axle retention device, etc. or for other purpose, such as to contact a bearing surface or a pivot member.
  • a second material such as a polymer or aluminum composition can be molded over the axle to form an axle block 92 in the region between the wheels 34R and 34L.
  • the axle block may be a formed from a single material, with cylindrical axle segments formed from a second material or the same material protruding from either end.
  • the axle block 92 could include a flat plane to sit flush on the inclined axle bearing surface 38, or another shaped surface that can interface with a similar or matched surface of the axle bearing surface 38, which in some embodiments can reduce wear on these surfaces.
  • various features needed to retain the axle 36 and wheels laterally and vertically could be readily molded into the axle block.
  • a central locating pin transverse to the axle, or locating washers 64L (and 64R, not depicted) may be molded as part of the axle block.
  • the axle could be fitted with bearings or bushings near the wheels so that said bearings or bushings provide rolling contact with the inclined axle bearing surface 38, in order to, for example, modify the steering response or reduce the wear and friction associated with sliding of the axle 38 on the inclined axle bearing surface 38.
  • sliding contact can be reduced or eliminated.
  • Bearings can be used to support the axle at a more central position, or only at a position just inside the wheels, or additional bearings or wider or multi-race bearings can be use to provide support along more of the axle's width.
  • an overmolded axle block 92 is depicted.
  • this can be a simple rectangular prism used in conjunction with the springs and/or pivots described previously, or may incorporate an extended pivot member section as illustrated, including optional curved and non-curved portions.
  • a narrow surface similar to a pivot member 40 can be incorporated into an axle block or a broad surface similar to an extended pivot member 80 or a curved extended pivot member 90.
  • the axle block 92 can be integral to the axle, or assembled to the axle.
  • a substantial portion of a conveyance can be molded out of a plastic material or a thermoplastic fiber reinforced thermoplastic composite as a single piece or as a small number of pieces for assembly, such as, the foot support platform 32, the rear fender 48, the inclined axle bearing surface 38, the pivot member 4G, any special means for retaining the compression springs 44L and 44R, the deadman's brake 60, and other features could all be molded in a single injection molding operation.
  • all or a portion of the parts can be produced separately.
  • some of these parts can be left out, for example the rear fender 48, the deadman's brake 60, or other features or combinations of features as desired.
  • Such molding can result in reduces cost and/or reduced weight of the conveyance.
  • features can be designed to simultaneously increase the stiffness and strength of the conveyance, while reducing the cost and amount of material' used.
  • FIG. 5 examples of molded-in cavities 54 are depicted. Variations of the design of molded-in cavities are possible, such as are used in the production of various items including those found in the lower leg assembly of a pedestal office chair, where said assembly was molded from a thermoplastic.
  • an extended flanges 56 on the central portion of the platform 32 in FIG. 5 can be incorporated, for example, to increase the bending stiffness of the foot support platform 32 about an-axis parallel to the rear axle.
  • portions of the device can be made from wood, metal, or some other appropriate material having appropriate characteristics of weight, stiffness and durability.
  • all or portions of the device can be machined, such as out of plastic, fiber reinforced plastic, metal, or wood.
  • parts can be cast or stamped out of metal.
  • Suitable metal for construction of the device include steels and alloys of steel, nickel and/or chromium containing materials, aluminum, titanium, copper, brass, bronze, etc.
  • a lighter material can be utilized for a portion of the device and a harder or more durable material for another portion. Elastomers can be utilized for portions of the device as well.
  • a gravity or centrifugal force can be utilized to provide assistance in recovering the conveyance from a turn.
  • a gravity or centrifugal force can be used in conjunction with springs, such as coil, leaf, elastomer, etc, or they can be used without springs.
  • the recovery from turning can be induced without springs by, for example, ensuring that as the axle pivoted, the central portion of the foot support platform 32 was forced away from the axle (See FIG. 4 ). This case, the central portion of the foot support platform 32 would be forced to increase in altitude as the conveyance was tilted and the axle pivoted.
  • altitude is defined as the distance from the road surface, or a plane having an analogous relationship to the wheels as a road surface, along an axis normal to the road surface or plane.
  • the central portion of the foot support platform 32 would normally be at a lower altitude from the road surface or analogous plane, and its altitude would increase if the axle pivoted in either direction.
  • a similar position restoring force can be provided by the centrifugal force experienced while turning the conveyance.
  • This linkage between the pivoting action, and an altitude increase of the foot support platform is referred herein as a "gravity spring", regardless of how it is accomplished.
  • a gravity spring provides a restorative force to return the axle to its normal position substantially perpendicular to the centerline of the skateboard, and the skateboard travels in a substantially straight line unless the rider applies a torque about the centerline by leaning.
  • Benefits with a gravity spring can include in some embodiments self-adjustment of a turn restorative force to the weight of a rider or load, reduced number of parts for construction of the conveyance, and elimination of parts subject to breakage or wear and requiring repair or replacement.
  • the turn restorative force tending to return the front axle to its normal position relative to the long axis of the conveyance 82 with a gravity spring can be related to the weight of the user, potentially rendering one set of parts suitable for riders having a range of weights.
  • the need for springs is eliminated, reducing the number of parts used in manufacturing and assembling the conveyance, and eliminating springs or bushings that can break or wear out.
  • a gravity spring is made by using an elongated pivot member 80 or 90 rather than a single pivot point, as depicted in FIGS. 11 , 12 , 14 , 16 , 17 , 18A and 18B .
  • the inclined axle bearing surface 38 can be planar, as in previously described embodiments, or otherwise, and the pivot member 80 or 90 is shaped so that as a compressive force is applied between the axle bearing surface 38 and the axle 36, such as when the rider leans or shifts his weight, the pivot point (or point of contact between the axle 38 and the pivot member 80 or 90) shifts towards the wheel closest to the compressive force. This shift causes the axle to rotate in a plane parallel to the travel surface (i.e. turn). In some embodiments, the rotation of the axle can cause a turn in the direction of the lean or shift in weight as depicted in FIG. 12 .
  • the center of the axle in the gravity spring shifts down the axle bearing plane, moving it farther away from the top surface of the board, increasing the altitude of the deck, and providing a restorative force.
  • the rider or load is closest to the road when the front axle 36 is perpendicular to the long axis of the conveyance 82, and at least a portion of his foot or the load is elevated whenever the conveyance tilts and the axle pivots in either direction. This contributes to the desired gravity spring effect that induces the conveyance to level out so that it travels in a substantially straight line unless the rider supplies a torque around the long axis 82 of the conveyance.
  • the magnitude of the centering force imposed by the gravity spring can depend on the width and shape of the pivot member, the angle of the inclined axle bearing surface, as well as other factors.
  • a simple rectangular extended pivot member 80 is shown in FIGS. 11-12 , but this block could be rounded off, as long as pivoting of the axle 36 away from its position perpendicular to the long axis of the conveyance 82 produces a shift in the central portion of the foot support platform 32 away from the axle 36.
  • a suitable curved extended pivot member is depicted in FIG. 14 . Additional embodiments of curved extended pivot members are provided in FIGS. 16 , 17 , 18A and 18B .
  • an extended pivot member 80 or 90 can be attached to the axle 36 instead of molding it as part of, or fixing it rigidly to, a stationary part such as a portion of the foot support platform 32 or the spring bearing surface 39.
  • the spring bearing surface 39 or other portion that the axle block 92 interfaces with could he planar, and an axle block could be overmolded on the axle as described previously.
  • the extended pivot member could be molded into the central region of the axle block 92, and bear against the spring bearing surface 39. Such an arrangement is depicted in FIG 15 .
  • a gravity spring includes constructing the inclined axle bearing surface 38 to have a non-planar bearing surface as depicted in FIG. 13 .
  • the inclined axle bearing surface is curved or segmented (88A and 88B), and the slope of the rear part of the surface 88B is less than the slope of the front part of the surface 88A, where the slope is measured by the angle between the plane and the top surface 51 of the foot support platform 32, however in some embodiments, the slopes of these two portions can be reversed, with the slope of the rear part of the surface 88B being greater than the slope of the front part of the surface 88A.
  • other embodiments can have a greater number of differently sloped surfaces on the inclined axle bearing surface 38, or a curved surface or a variably curved surface where the radius of curvature changes along the surface.
  • the inside wheel moves closer to the top surface 51 of the foot support platform 32 along the lesser slope of the rear part of the inclined axle bearing surface 88B.
  • the terms "inside” and “outside” refer to the conventional definitions of the inside and outside of the turn.
  • the outside wheel moves farther from the top-surface 51 of the foot -support platform 32 along the greater slope of the forward part of the inclined axle bearing surface 88A. Because of this, the outside wheel moves away from the top surface 51 by more than the inside wheel moves towards said top surface 51, and the altitude of the center of the top surface 51 of the foot support platform increases.
  • the inclined axle bearing surface can frequently-be shaped so that the altitude of the center of the top surface of the foot support platform is lowest when the axle 36 is perpendicular to the long axis of the conveyance 82 or the altitude of the center of mass of the foot support platform 32 is lowest when the axle 36 is in its normal position, not influenced by an induced tilt of the foot support platform 32.
  • the inclined axle bearing surface 88 can have a complex curvature designed to facilitate keeping most of the axle in contact with the inclined axle bearing surface 88, regardless of the degree of pivot, which can have a larger slope towards the front of the conveyance, and a lesser slope towards the rear with a gravity spring unit mounted in the front portion of the conveyance and a larger slope towards the rear of the conveyance and a lesser slope towards the front with a gravity spring unit mounted in the rear portion of the conveyance.
  • a gravity-spring unit can be combined with a set of compression springs 44R and 44 to create a combined force to restore the conveyance to substantially straight fine motion (or other normal travel direction as designed into the unit).

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  • Motorcycle And Bicycle Frame (AREA)
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  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)

Claims (20)

  1. Transporteinrichtung mit:
    einer Plattform (32), die eine Fahrfläche (50) auf der ein Fahrer einen Fuß platzieren kann, um die Einrichtung in einer Fahrtrichtung auf dem Boden zu fahren, so aufweist, dass die Fahrfläche während der Benutzung eine obere Fläche ist, wobei die Plattform eine Länge, die sich in dieser Richtung erstreckt und einen vorderen Abschnitt und einen hinteren Abschnitt aufweist;
    einem Paar Räder (34), das entweder an den vorderen Abschnitt oder an den hinteren Abschnitt angrenzt und zumindest einem Rad (46), das an den anderen Abschnitt angrenzt;
    eine Achse (36), die sich zwischen dem Paar Räder erstreckt und in einem, an der Plattform angebrachten Achsenanbringsystem, angeordnet ist;
    wobei das Achsenanbringsystem eine Achsenlagerfläche (38) und ein Schwenkelement (40, 80, 90 oder 92) mit einer Schwenkfläche (43) aufweist, wobei die Achsenlagerfläche und die Schwenkfläche zueinander hin geneigt sind und die Achsenlagerfläche und die Schwenkfläche bezüglich der Fahrfläche geneigt sind;
    wobei die Schwenkfläche einen Schwenkpunkt erzeugt um den die Achse schwenken kann, um während der Benutzung eine Wendefunktion für die Einrichtung bereitzustellen und sich die Achsenlagerfläche quer zu der Länge erstreckt und eine Fläche bereitstellt, welche die Achse während des Schwenkens der Achse und des Wendens der Einrichtung hält, dadurch gekennzeichnet, dass
    die Schwenkfläche mit dem Äußeren der Achse in Kontakt steht und einen Kontaktpunkt zwischen dem Äußeren der Achse und der Kontaktfläche erzeugt um welchen die Achse schwenken kann.
  2. Einrichtung nach Anspruch 1, wobei
    das Achsenanbringsystem so ausgestaltet ist, dass sich, wenn sich ein Benutzer lehnt, um die Einrichtung zu wenden, die Plattform in die Wenderichtung neigt und sich die Mitte der oberen Fläche der Plattform erhöht, wenn sich die Achse auf der geneigten Achsenlagerfläche bewegt, um eine neue Position darauf zu etablieren.
  3. Einrichtung nach einem der vorhergehenden Ansprüche, wobei
    die Achse eine Länge aufweist und die Achsenlagerfläche eine Länge aufweist, die im Wesentlichen die Gleiche ist, wie die Länge des Abschnitts der Achse zwischen den Rädern.
  4. Einrichtung nach Anspruch 1, wobei
    das Schwenkelement (40) einen Abschnitt mit einem im Wesentlichen dreieckigen Querschnitt aufweist.
  5. Einrichtung nach einem der vorhergehenden Ansprüche, wobei
    die Schwenkfläche (90) gekrümmt ist.
  6. Einrichtung nach einem der vorhergehenden Ansprüche, wobei
    die Achsenlagerfläche einen im Wesentlichen planaren Abschnitt, zwei oder mehr im Wesentlichen planare Abschnitte oder einen gekrümmten Abschnitt aufweist.
  7. Einrichtung nach einem der vorhergehenden Ansprüche, wobei
    die Kontaktabschnitte auf der Oberfläche des Schwenkelements, die als die Achsenschwenkpunkte definiert sind, eine Kurve beschreiben, die im Wesentlichen parallel zu einer Ecke eines Winkels zwischen der Oberfläche des Schwenkelements und der Lagerfläche ist.
  8. Einrichtung nach einem der vorhergehenden Ansprüche, wobei
    die Achsenlagerfläche oder die Oberfläche des Schwenkelements eine diskontinuierliche Fläche ist.
  9. Einrichtung nach Anspruch 1, ferner mit
    mindestens einem Federelement (44), das mit der Achse in Kontakt steht, um die Achse auf die Achsenlagerfläche zu drücken.
  10. Einrichtung nach Anspruch 5, wobei
    die gekrümmte Fläche des Schwenkelements einen Abschnitt mit einem Krümmungsradius von ca. 140 bis ca. 170 mm aufweist.
  11. Einrichtung nach Anspruch 5, wobei
    die gekrümmte Fläche des Schwenkelements einen Mittelabschnitt (122) mit einem ersten Krümmungsradius, einen ersten Außenabschnitt (124) mit einem zweiten Krümmungsradius und einen zweiten Außenabschnitt (125) mit einem dritten Krümmungsradius, aufweist.
  12. Einrichtung nach Anspruch 11, wobei
    der erste Krümmungsradius größer ist als der zweite oder dritte Krümmungsradius.
  13. Einrichtung nach Anspruch 11, wobei
    sich der erste Außenabschnitt und der zweite Außenabschnitt an gegenüberliegenden Seiten des Mittelabschnitts befinden.
  14. Einrichtung nach Anspruch 11, wobei
    sich, der an dem Mittelabschnitt des Schwenkelements gemessene Winkel von dem an dem Außenabschnitt des Schwenkelements gemessenen Winkel unterscheidet.
  15. Einrichtung nach Anspruch 1, wobei
    die Schwenkfläche an der Achse ausgebildet ist.
  16. Einrichtung nach Anspruch 1, wobei
    die Plattform eine obere Fläche aufweist, die eine erste Ebene definiert und die Achsenlagerfläche einen Winkel mit einer zweiten Ebene parallel zu der ersten Ebene ausbildet, der ca. 26 bis ca. 45 Grad oder ca. 30 bis ca. 40 Grad beträgt.
  17. Einrichtung nach einem der vorhergehenden Ansprüche, wobei
    die Fahrfläche ausgestaltet ist, um ausreichend klein zu sein, um einen Fuß eines angedachten Benutzers flach auf der Fahrfläche aufzunehmen, aber nicht jedoch den anderen Fuß flach auf der Fläche aufzunehmen.
  18. Einrichtung nach einem der vorhergehenden Ansprüche, mit
    einem Griffelement (120), das an dem vorderen Abschnitt der Plattform angebracht ist.
  19. Einrichtung nach einem der vorhergehenden Ansprüche, mit
    einem Griffelement (121), das an dem hinteren Abschnitt der Plattform angebracht ist.
  20. Einrichtung nach Anspruch 1 bis 3 und 5 bis 19, wobei
    sich die Schwenkfläche quer zu der Länge erstreckt, und um welche die Achse schwenken kann, um es der Achse zu ermöglichen, so über die Achsenlagerfläche zu gleiten, dass sich während der Benutzung, wenn die Einrichtung wendet und eine Druckkraft zwischen der Achsenlagerfläche und der Achse aufgebracht wird, der Schwenkpunkt auf der Schwenkfläche zu dem Rad, das am nächsten zu der Druckkraft liegt, hin verschiebt.
EP09717559.0A 2008-03-06 2009-03-06 Transportvorrichtung mit schwenkachse Active EP2265347B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6445808P 2008-03-06 2008-03-06
PCT/US2009/036428 WO2009111761A2 (en) 2008-03-06 2009-03-06 Transportation device with pivoting axle

Publications (2)

Publication Number Publication Date
EP2265347A2 EP2265347A2 (de) 2010-12-29
EP2265347B1 true EP2265347B1 (de) 2014-10-08

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ID=40847914

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US (9) US8186693B2 (de)
EP (1) EP2265347B1 (de)
JP (1) JP5390542B2 (de)
KR (1) KR101228632B1 (de)
CN (1) CN201482128U (de)
AU (1) AU2009221691B2 (de)
CA (1) CA2719096C (de)
DE (1) DE212009000030U1 (de)
MX (1) MX2010009667A (de)
NZ (1) NZ587695A (de)
WO (1) WO2009111761A2 (de)
ZA (1) ZA201007041B (de)

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USD976333S1 (en) 2020-11-03 2023-01-24 Zhejiang Well Shine Industry & Trade Co., Ltd. Scooter
CN214138823U (zh) 2020-12-31 2021-09-07 纳恩博（北京）科技有限公司 滑板车的套件以及滑板车
USD958257S1 (en) 2021-04-02 2022-07-19 Inmotion Technologies Co., Ltd. Scooter
CN113734333B (zh) 2021-09-08 2023-05-02 士商（上海）机械有限公司 一种代步车
EP4382181B1 (de) 2022-12-05 2025-07-23 Shenzhen Xincheng Times Technology Co., Ltd Elektrischer motorroller mit doppeltem zweck

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KR101228632B1 (ko) 2013-01-31
US9339720B2 (en) 2016-05-17
WO2009111761A3 (en) 2009-12-03
WO2009111761A2 (en) 2009-09-11
AU2009221691A1 (en) 2009-09-11
JP5390542B2 (ja) 2014-01-15
JP2011513007A (ja) 2011-04-28
US20160332061A1 (en) 2016-11-17
US20150069725A1 (en) 2015-03-12
US20090273150A1 (en) 2009-11-05
DE212009000030U1 (de) 2011-02-10
US20250153030A1 (en) 2025-05-15
US20230415024A1 (en) 2023-12-28
KR20110039211A (ko) 2011-04-15
US20190314709A1 (en) 2019-10-17
ZA201007041B (en) 2011-06-29
US20130147138A1 (en) 2013-06-13
MX2010009667A (es) 2011-04-26
US20120235368A1 (en) 2012-09-20
US8371590B2 (en) 2013-02-12
EP2265347A2 (de) 2010-12-29
CA2719096A1 (en) 2009-09-11
US12257492B2 (en) 2025-03-25
AU2009221691B2 (en) 2011-11-24
CN201482128U (zh) 2010-05-26
US8695993B2 (en) 2014-04-15
CA2719096C (en) 2013-05-14
US8186693B2 (en) 2012-05-29
US11565169B2 (en) 2023-01-31
US20220118344A1 (en) 2022-04-21
US10137356B2 (en) 2018-11-27
US11033799B2 (en) 2021-06-15
NZ587695A (en) 2012-07-27

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